clz               226 opal/mca/hwloc/hwloc201/hwloc/include/private/misc.h extern int clz(int) __hwloc_attribute_const;
clz               229 opal/mca/hwloc/hwloc201/hwloc/include/private/misc.h #  define hwloc_fls(x) (x ? (8*sizeof(int) - clz(x)) : 0)